Using these Hot Wheels Monster Trucks is super easy. Just grab a truck and let it roll on flat surfaces or create your own tracks. It's great for both indoor and outdoor play. When playing, be careful not to throw the trucks too hard as they might break. Also, keep them away from small children who might put them in their mouths. To keep the trucks in good condition, wipe them with a dry cloth every once in a while. If they get dirty, you can use a little bit of mild soap and water, but make sure to dry them thoroughly afterwards.